1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4004246e2be980b4fd9a8a8e0d7446385afdd48dcd25a6d89e47a9a1d5c8afa. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27b9be05-251e-4f61-a1d1-ab2344b38d6c.json and https://artists.proofprofile.net/proofs/artist/27b9be05-251e-4f61-a1d1-ab2344b38d6c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0698142ff2b43d3bc3ce9de77cefb370cb3e4c8f274ed9c4b653cc203ebc07a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMEF1400674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536938ae14e11f59c7444a8cb88c337bf27c8180e8675b18300a924afafd4664. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMEF1400675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c70c362c815459f218966c52d28bbc31e4ca7af61ab005efed4cb0ae4ebc51. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEUE2000274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6975516935dea0e3c65d1163b316168d03b5bb68d57dca3809a9f2d611ed121. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEUE2000277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c70c362c815459f218966c52d28bbc31e4ca7af61ab005efed4cb0ae4ebc51. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEUE2000274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6975516935dea0e3c65d1163b316168d03b5bb68d57dca3809a9f2d611ed121. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEUE2000277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e166944e899e2437ec27fba994d7987e530ae3ba4367719d004125cd934998. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT2300318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e166944e899e2437ec27fba994d7987e530ae3ba4367719d004125cd934998. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT2300318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ece7fdb86403895b4ea57599d3654a454870b1a087c4d9eabfb2aef9ec05550. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f2e85c00fee2e5329503996c3a1615be1c269ac14fd2a40964b41005c6e87c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT2300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f2e85c00fee2e5329503996c3a1615be1c269ac14fd2a40964b41005c6e87c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT2300319.
Really (Nothing is Cool) - Max Wheeler Dub Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073bcca1d18e5b0e4a5ede5416b1734168bd69b9cc367fadd46e9ba2e07baf9d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT2400223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e166944e899e2437ec27fba994d7987e530ae3ba4367719d004125cd934998. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT2300318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ece7fdb86403895b4ea57599d3654a454870b1a087c4d9eabfb2aef9ec05550. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3b968ba63cbc0ea24e40edd265edfb1df21c2b739399e26574f2cdc1258cd6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT2300321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3b968ba63cbc0ea24e40edd265edfb1df21c2b739399e26574f2cdc1258cd6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT2300321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f2e85c00fee2e5329503996c3a1615be1c269ac14fd2a40964b41005c6e87c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT2300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e69f804a010b7996a30504fb49cbd479f647fa723c639a365c7bb47b876cff6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT2300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fbd3fc5c63c43e644420830cc85093dc863ebf02d6e4786e869a59ebe03be7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEQT2300322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06522f761200e90d9bc4659a75337849b2d0d2ed769b50cfd8139f2da7e353ea. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMEF1300631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d0dfd7a07817b680f43598710021a03f1184259378f090501f85b340efff90. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMEF1500867.